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Summary of Restricted Stock Award (Detail) (USD $)
 12 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Jan. 31, 2012
Schedule Of Share Based Compensation Restricted Stock Units Award Activity [Line Items]      
Shares,Balance, Beginning 3,690,000 0  
Shares,Granted 62,000 3,690,000  
Shares,Released 0    
Shares,Balance, Ending 3,752,000 3,690,000 0
Vested and exercisable 6,066,890    
Balance, Weighted Average Remaining Life (Years) 1 year   0 years
Balance, Weighted Average Remaining Life,Granted 1 year 8 months 12 days 1 year 10 months 24 days  
Aggregate Intrinsic Value,Balance, Biginning $ 36,900 $ 0  
Aggregate Intrinsic Value,Granted 620 36,900  
Aggregate Intrinsic Value,Balance, Ending $ 37,520 $ 36,900 $ 0
Weighted Average Fair Value,Balance, Biginning $ 0.01 $ 0  
Weighted Average Fair Value,Granted $ 0.01 $ 0.01  
Weighted Average Fair Value,Balance, Ending $ 0.01 $ 0.01 $ 0
Restricted Stock [Member]
      
Schedule Of Share Based Compensation Restricted Stock Units Award Activity [Line Items]      
Balance, Weighted Average Remaining Life (Years)   1 year 10 months 24 days